209972021

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{401}}^1$

素因数の和:585

約数の個数: 32

約数和(自身を含む): 263454720

約数和(自身を除く): 53482699

約数列:

[1, 7, 19, 31, 127, 133, 217, 401, 589, 889, 2413, 2807, 3937, 4123, 7619, 12431, 16891, 27559, 50927, 53333, 74803, 87017, 236189, 356489, 523621, 967613, 1578737, 1653323, 6773291, 11051159, 29996003, 209972021]

約数ペア:

[(1, 209972021), (7, 29996003), (19, 11051159), (31, 6773291), (127, 1653323), (133, 1578737), (217, 967613), (401, 523621), (589, 356489), (889, 236189), (2413, 87017), (2807, 74803), (3937, 53333), (4123, 50927), (7619, 27559), (12431, 16891)]